User:Danthemango/physics/equations

Equations useful for Grade 11 and 12 Physics I will post this on wikiversity, as soon as I see a useful place to put it.

Error

 * $$\% Error = uncertainty/measure*100$$
 * $$\% Error = (measure/accepted)/accepted*100$$
 * $$\% difference = (difference/average) *100$$

Circuits

 * $$E=V*I*t$$
 * $$Q=Ne^-$$
 * $$V=E/Q$$
 * $$e^-=1.6*10^-19$$
 * $$I=Q/t$$
 * $$R=V/I$$
 * $$P=V*I$$
 * $$P=E/t$$
 * $$P=I^2*R$$
 * $$P=V^2/R$$
 * $$1KWh=3.6*10^6J$$

Kinematics

 * $$1 Km/h = 3.6 m/s$$
 * $$v = \frac{ \Delta\ d }{ \Delta\ t }$$
 * $$s = \Delta\ d/ \Delta\ t$$
 * $$a = \Delta\ v/ \Delta\ t$$
 * $$\Delta\ d=\bar{v}\ *\Delta\ t=\frac{v_1+v_2}{2}\Delta\ t$$
 * $$\Delta\ d=v_1*\Delta\ t+\frac{1}{2}*a*\Delta\ t^2$$
 * $$a=\frac{v_2-v_1}{\Delta\ t}$$
 * $$g=9.80 m/s^2$$
 * $$v_2=v_1^2+2*a*d$$

Force and Momentum

 * $$F_{net}=m*a$$
 * $$F_{net}=F_A-F_f$$
 * $$F_f=\mu\ *F_N$$
 * $$F=k*\delta\ l$$
 * $$p=m*v$$
 * $$\Delta\ p=m*\Delta\ v=m* (v_2-v_1)=F*\Delta\ t$$
 * $$1Kg*m/s=1N*s$$
 * $$m_1*v_1+ m_2*v_2=m_1*v_1'+ m_2*v_2'$$
 * $$m_1*v_1+ m_2*v_2=(m_1+m_2)*v'$$
 * $$W=F_A*d$$
 * $$E_p=m*g*h$$
 * $$E_k=\frac{1}{2}*m*v^2$$
 * $$\% Elasticity=\frac{E_k'}{E_k}$$

Waves and Optics

 * $$\frac{\lambda\ _1}{\lambda\ _2}=\frac{v_1}{v_2}$$
 * $$v=F*\lambda\ $$
 * $$n=\frac{v_{vac}}{v_{med}}$$
 * $$n=\frac{-sin(c)}{sin(r)}$$
 * $$n_1*sin(\theta\ _1)=n_2*sin(\theta\ _2)$$
 * $$\frac{1}{d}=\frac{1}{f}-\frac{1}{d_0}$$
 * $$m=\frac{-d_1}{d_0}$$
 * $$n*\lambda\ =\frac{d*k_n}{l}$$
 * $$L=L_0*\sqrt{1-(\frac{v}{c})^2}$$
 * $$m=\frac{m_0}{L}*\sqrt{1-(\frac{v}{c})^2}$$